Composite action in concrete filled tubes
Composite action in concrete filled tubes
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DOI：
10.1061/(asce)0733-9445(1999)125:5(477
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发表时间：
1999-05-01
期刊：
影响因子：
--
通讯作者：
Brown, CB
中科院分区：
文献类型：
--
作者：
Roeder, CW;Cameron, B;Brown, CB
本文研究复合作用的混凝土填充管（CFT）的尺寸和比例，如在美国使用的实践。指出了钢管混凝土在建筑中的应用以及粘结应力和界面条件对性能的重要性，总结了以往的研究成果，并对综合结果进行了分析。实验研究进行了描述和评价。结果表明，收缩可以是非常有害的粘结应力能力，和收缩的重要性取决于混凝土的特性，管的直径，在管的内部和表面条件。大直径管和大d/t比的粘结能力较小。粘结承载力与钢-混凝土界面滑移密切相关。滑移前粘结应力呈指数分布，滑移后粘结应力呈更均匀的分布。一个方程，估计债券的应力能力的开发，这导致在不同的性能水平的设计建议。
This paper studies composite action in concrete filled tubes (CFT) that have dimensions and proportions like those used in U.S. practice. CFT applications in buildings and the importance of bond stress and interface conditions to behavior are noted, past research is summarized, and the combined results are analyzed. An experimental study is described and evaluated. It is shown that shrinkage can be very detrimental to bond stress capacity, and the importance of shrinkage depends upon the characteristics of the concrete, the diameter of the tube, and the surface condition at the inside of the tube. The bond capacity is smaller with large diameter tubes and large d/t ratios. The bond capacity is interrelated with slip at the steel concrete interface. An exponential distribution of bond stress is expected prior to slip, and a more uniform distribution occurs after slip. An equation that estimates the bond stress capacity is developed, and this leads to design recommendations at different performance levels.